Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V
The phenomenon of gradual decrease of internal stress with the deformation of material maintained under the precondition of certain temperature and initial stress or pre-strain is called stress relaxation. Due to that, the flow stress of the metal material falls rapidly when the hot forming process...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | MATEC Web of Conferences |
| Subjects: | |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11076.pdf |
| _version_ | 1818728864824688640 |
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| author | Zhang Xingzhen Deng Ying Liang Tian Jin Shihan Li Weidong |
| author_facet | Zhang Xingzhen Deng Ying Liang Tian Jin Shihan Li Weidong |
| author_sort | Zhang Xingzhen |
| collection | DOAJ |
| description | The phenomenon of gradual decrease of internal stress with the deformation of material maintained under the precondition of certain temperature and initial stress or pre-strain is called stress relaxation. Due to that, the flow stress of the metal material falls rapidly when the hot forming process pauses, and then the required forming load. In this paper, the experiment was carried out to study the stress relaxation property of Ti-6Al-4V, in the temperature range of 1023K~1123K and with the pre-tension strain 0.7%, 4% and 10%. The quartic delay function was used to describe the stress relaxation behavior. The predicted value of stress relaxation equation is in good agreement with the experimental data, and the correlation coefficient is above 0.99. Arrhenius creep constitutive equation embedded in CAE software was derived. The finite element model of stress relaxation process of test bar was builded, and the tensile-relaxation experiment was performed under the loading condition of 1:1 part forming process. The forming force results agree well, and the validity and accuracy of the constitutive model are verified, laying a foundation for the subsequent process simulation and optimization. |
| first_indexed | 2024-12-17T22:36:46Z |
| format | Article |
| id | doaj.art-bcabbc72a4754fe8bde71281ff8e67c7 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-17T22:36:46Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-bcabbc72a4754fe8bde71281ff8e67c72022-12-21T21:30:04ZengEDP SciencesMATEC Web of Conferences2261-236X2020-01-013211107610.1051/matecconf/202032111076matecconf_ti2019_11076Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4VZhang XingzhenDeng Ying0Liang Tian1Jin Shihan2Li Weidong3AVIC Manufacturing Technology InstituteAVIC Manufacturing Technology InstituteBeihang UniversityBeihang UniversityThe phenomenon of gradual decrease of internal stress with the deformation of material maintained under the precondition of certain temperature and initial stress or pre-strain is called stress relaxation. Due to that, the flow stress of the metal material falls rapidly when the hot forming process pauses, and then the required forming load. In this paper, the experiment was carried out to study the stress relaxation property of Ti-6Al-4V, in the temperature range of 1023K~1123K and with the pre-tension strain 0.7%, 4% and 10%. The quartic delay function was used to describe the stress relaxation behavior. The predicted value of stress relaxation equation is in good agreement with the experimental data, and the correlation coefficient is above 0.99. Arrhenius creep constitutive equation embedded in CAE software was derived. The finite element model of stress relaxation process of test bar was builded, and the tensile-relaxation experiment was performed under the loading condition of 1:1 part forming process. The forming force results agree well, and the validity and accuracy of the constitutive model are verified, laying a foundation for the subsequent process simulation and optimization.https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11076.pdfstress relaxationquartic delay functionconstitutive modelexperiment and fea |
| spellingShingle | Zhang Xingzhen Deng Ying Liang Tian Jin Shihan Li Weidong Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V MATEC Web of Conferences stress relaxation quartic delay function constitutive model experiment and fea |
| title | Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V |
| title_full | Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V |
| title_fullStr | Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V |
| title_full_unstemmed | Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V |
| title_short | Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V |
| title_sort | modeling and verification of stress relaxation behavior of ti 6al 4v |
| topic | stress relaxation quartic delay function constitutive model experiment and fea |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11076.pdf |
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